It is a co-educational, English Medium institution affiliated to Indian Certificate of Secondary Education Board, New Delhi.
[1] The school has been ranked 6th in the "most respected secondary schools" in India list compiled by IMRB in 2007[2] CMS RDSO was established in 1964 under the guidance of Preeti Kaur.
[3] The top ten position holders of CMS RDSO branch scored 95% and above in the ICSE boards in 2011-2012.
Anika Pandey led the ISC Board in 2010-11 with 96.5% marks in the Commerce stream.
Ms. Anika and Manjari Yadav, secured the required cutoff for the Shri Ram College of Commerce, New Delhi.